Jump to content
SAU Community

GFB BOV Hybrid #1003 installed.YUK YUK YUK YUK!!!!

superspit
 Share

Recommended Posts

superspit Mentor

superspit

Posted
Posted

Hi, and thankyou to those who gave advice on my G-FORCE thread!

Some interseting things came from that!!

Anyways....Installed the GFB BOV last nite (after boost/rev problem was sorted as per previous thread), and I'm about to take the bloody thing BACK OFF! Noise is nice..if ur into that...but power flow is lost...that is...boost comes on slower, but still there. I've checked for leaks: I suspect that the valve itself is so badly built that it has inherent leaking abilities. After my G-FORCE issue thread, I now realise that even the slightest leak in our cars induction system will cause grief...and potentially more dollars to find and fix.

Has anyone else expd this? GOOGBYE to Go Fast Bits BOV......and f**k you!

Thanx.Mark.

superspit Mentor

superspit

Posted
  • Author
Posted
stock BOV leaks

I'm willing to bet that a good condition stock BOV is still better, in this case!!

Just way too many 'joints and screw in parts' on the After Market stuff.

Do you think the whole BOV thing on a relatively standard car may be a bit of a wank??? I mean, they look good 'en all.....but........

Guest RedLineGTR

Guest RedLineGTR

Posted
Posted

i have a GFB hybrid BOV installed on my car for about a year or so now experimenting with the stock one (temp), the GFB one held boost fine didnt notice any type of leaks or anything, the boost came on harder with the GFB one as compaired to the stock BOV which does leak abit and you get boost comming on much smoother, but i like the whiplash :)

rs73 Grand Master

rs73

Posted
Posted
stock BOV leaks

I've seen ppl running over 1 Bar using stock BOV and it's fine. If yours leak, change the BOV spring so you can hold more boost. Might worth to check that your wastegate is not leaking before accusing the stock BOV as the culprit.

BTW, who needs choo choo sound anyway? Leave it to locomotives....

Zensoku Collaborator

Zensoku

Posted
Posted

guys, depends on the individual setup on your car...

is it mounted:

1. After the intercooler and before the throttle body?

or...

2. After the turbo and before the intercooler?

reason i ask is because if there is a pressure variance between what's actually trying to "push" the BOV open and what's running down it's vacuum hose, then you're bound to get leaks. I wouldn't be quick to blame the BOV to be at fault. As quite often than not, the problem can be associated with situation number 2 (above).

In most situations, for example, there might be 15psi coming from the turbo compressor housing, but by the time the boost pressure makes its way through the intercooler and piping, this pressure may have dropped to say 12 psi due to intercooler and piping restrictions...

The pressure in the inlet manifold which travels down the vacuum line to the BOV will not being "enough" to hold the BOV shut when the throttle is open. Hence, your leaks you are reporting...

superspit Mentor

superspit

Posted
  • Author
Posted

I used the proper GFB adaptor kit, (Ofcourse you want the best chance of it working),

seemed to mount on nicely to the pipe, then the sus bit, you have to install a pissy little O ring inside the BOV base that really seems slack. Between that O ring and the vac nipple i could just see POTENTIAL for leaks...I just was not confident even before turning the key!! Then that bloody 'flutter" and woosh..My little brother loves it, but if someone took my rego down, I wouldn't be surprised. If i was to PLUM it straight back into the turbo and block off the 'trumpet' part (1 of 3 options in the kit), then what's the point of having it......it still leaks..Now the ridgey didge is back on....***** ACE!!

superspit Mentor

superspit

Posted
  • Author
Posted
I havnt put mine on yet but the first thing i changed with it was the adapter, and swapped it with a direct bolt-on to fit a skyline..

yep, that's wot I did ,bro........test it in second gear going hard....does your boost feel like it's coming in later and ..i don't know...just different??

GOOD LUCK!!!

superspit Mentor

superspit

Posted
  • Author
Posted
I'm expecting one of these to turn up in my mailbox any day now. The first thing I am planning to do is get it welded to a proper adapter so there is absolutely no leaks.

keep an eye on that O ring and 'nipple' , maybe you should 'teflon tape'it?

superspit Mentor

superspit

Posted
  • Author
Posted
I've seen ppl running over 1 Bar using stock BOV and it's fine. If yours leak' date=' change the BOV spring so you can hold more boost. Might worth to check that your wastegate is not leaking before accusing the stock BOV as the culprit.

BTW, who needs choo choo sound anyway? Leave it to locomotives....

ummm, my friend....mmmm..good comment on the choo choo, I agree.

But, ummm....did I not base the entire thread on saying that the stock BOV is good? Have a re-read my GT brother, andhavagoodweekend.

Zensoku Collaborator

Zensoku

Posted
Posted

fatgts-r, i should have been more careful with my explanation. i think you understood the point i was making, but you also picked up on my mistake. good spot!

setup number 2 is the culprit. not setup number 1. all GTR skylines are setup like situation number one. have you heard an gtr owners complain about boost leaks?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • joshuaho96
      Ethanol Content Sensor - Always at 11%?

      By joshuaho96 · Posted

      In the US almost everything is E10. It can't exceed 10% by much or fuel systems have trouble adapting. At the same time because MTBE, MMT, and TEL are all banned they need as much ethanol in it as possible to boost octane.
    • Kinkstaah
      NC MX5

      By Kinkstaah · Posted

      I was mostly jesting. In my experience (and probably only my experience) the R34 GTT physical airbox space is actually too small to flow the amount of power it wanted. By sealing the box, I made it so it could only be fed by the ducts themselves. So you can seal it up and get nice cold air which IS good, but at a certain crossover point: More Hot Air > Less Cold Air I don't think you're at this point. In my case merely ducting the hot air intake with a very focused set of ducts counteracts the fact it's in a V8 engine bay. More cold air obviously best. The solution looks great.
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Nah, the OEM CAI pipe is still installed behind the bumper, it is about 5" x 3" oval at the engine side, tapering down to a 3" pipe behind the bumper where it gets all the ambient air it needs Engine side of radiator support OEM intake pipe "oval hole" that is right in front of the filter My OEM NC1 CAI pipe: From NC2 onwards, below pic, they come slightly smaller at 2.75" diameter with corrugations and a resonance chamber to reduce intake noise, lucky for me my NC1 has the bigger noisy one, LOL   Basically, the "sealed" airbox will just get ambient air from a 3" pre filter intake tube that is the same size, 3" as the rest of the intake pipe post filter, and if a 3" intake isn't big enough to flow enough air for 150 killerwasps then there are other issues The whole intake is basically the same length as OEM, but it is now about 30% bigger from the airbox back through to the new intake plenum than OEM, and the intake plenum is port matched to the head And the intake is now about 30% bigger than my 2.5" exhaust, so the suck, squeeze, bang and blow black magic should be fine, well, to my uneducated understanding of fluid dynamics anyway Talking the the guys at MX5 Mania, it may even make a few more killerwasps as the intake isn't sucking hot air, especially off idle or when in slow traffic when it would be sucking hot air  As for the difference in IAT, I haven't logged IAT yet, as I don't currently have a OBD2 reader, but I will have a play with my thermal lazer thingie next time I take the car out to sèe how hot stuff gets under the bonnet near the intake filter prior to installing the air box, my "assumption is it has to be much better after the air box is in and sealed up compared to what it is now The aftermarket "performance" CAI elephant in the room: Aftermarket CAI intakes typically have the air filter tucked up behind the bumper, with a 2.5" intake tube (the OEM intake pipe is actually about 30% bigger than the fancy pants "aftermarket" version.....WTF), and you need to remove the bumper to service the filter, which is a PITA Like dis:    
    • soviet_merlin
      Howdy Y'all

      By soviet_merlin · Posted

      Nice one, I'd argue that the white S1 RS260 is certainly the best looking of the Stageas. And yes, fully agree on the forum situation. It's a bit of a shame, but at least SAU is a good place to be. I found the facebook groups to give me FOMO because people were trying to one-up each other and show off in some way. Feels much more natural here. There are people with seriously nice builds, but I can appreciate it rather than it making me question my life choices. Might be that people are more open with sharing how much work/money/suffering it takes to actually get there. 
    • aznriptide859
      Howdy Y'all

      By aznriptide859 · Posted

      Evening, wanted to pop in and finally register to say hi to everyone here on SAU!   It's been a while since I've been active on a forum, but back in the day I used to be relatively active on ClubLexus and other hobby-related forums. I'm glad to see SAU is still around, since with the advent of Facebook and Discord it seems forums aren't what they once were. As a recent new owner of an S1 260RS Stagea, I've found so many older guides and helpful tips from SAU that I figured I needed to join and say a grave thank you. My recent acquisition has only become legal in the US for the past year, and knowing that similar car enthusiasts from across the pond have already figured out the kinks and tricks to get these 25+ year old cars running well. I look forward to diving into more of the SAU forums as well as hopefully contribute some info myself for future posterity.   As a pic tax, here is one of the few good photos I have of my Stagea. I hope to get way more in the future!    
×
×
  • Create New...